| | P | Placed on 60-Day IL (The Cincinnati Reds transferred LHP Alex Young from the 15-day injured list to the 60-day injured list.) |
| | P | Sent to Minors (The Cincinnati Reds optioned SP Casey Legumina to the minors.) |
| | P | Activated (The Cincinnati Reds activated LHP Sam Moll from the 15-day injured list.) |
| | P | Recalled From Minors Rehab (The Cincinnati Reds recalled RHP Casey Legumina from the minors.) |
| | P | Placed on 15-Day IL (The Cincinnati Reds placed RHP Frankie Montas on the 15-day injured list with a forearm contusion.) |
| | | Signed (The Cincinnati Reds signed RHP Bryan Salgado to a minor league contract.) |
| | | Signed (The Cincinnati Reds signed RHP Bryan Salgado to a minor league contract.) |
| | P | Placed on 60-Day IL (The Cincinnati Reds transferred RHP Tejay Antone from the 15-day injured list to the 60-day injured list. ) |
| | 2B | Claimed on Unconditional Release Waivers (The Cincinnati Reds claimed INF Livan Soto off waiver from the Baltimore Orioles and optioned him to the minors.) |
| | P | Activated (The Cincinnati Reds activated LHP Nick Lodolo from the 15-day injured list.) |
| | P | Sent to Minors (The Cincinnati Reds optioned RHP Carson Spiers to the minors.) |
| | P | Recalled From Minors Rehab (The Cincinnati Reds recalled RHP Carson Spiers from the minors.) |
| | P | Placed on 15-Day IL (The Cincinnati Reds placed RHP Tejay Antone on the 15-day injured list.) |
| | P | Sent to Minors (The Cincinnati Reds sent SP Nick Lodolo to the minors on a rehab assignment.) |
| | P | Sent to Minors (The Cincinnati Reds sent LHP Sam Moll to the minors on a rehab assignment.) |
| | 1B | Signed (The Cincinnati Reds signed 1B Mike Ford to a minor league contract.) |
| | SS | Placed on 10-Day IL (The Cincinnati Reds transferred INF Matt McLain from the 10-day injured list to the 60-day injured list.) |
| | P | Placed on 15-Day IL (The Cincinnati Reds placed LHP Brandon Williamson on the 15-day injured list.) |
| | P | Placed on 15-Day IL (The Cincinnati Reds placed RHP Ian Gibaut on the 15-day injured list.) |
| | P | Placed on 15-Day IL (The Cincinnati Reds placed LHP Sam Moll on the 15-day injured list.) |
| | LF | Recalled From Minors Rehab (The Cincinnati Reds recalled OF Bubba Thompson from the minors.) |
| | P | Placed on 15-Day IL (The Cincinnati Reds placed LHP Alex Young on the 15-day injured list.) |
| | CF | Placed on 10-Day IL (The Cincinnati Reds placed OF TJ Friedl on the 10-day injured list.) |
| | P | Placed on 15-Day IL (The Cincinnati Reds placed LHP Nick Lodolo on the 15-day injured list.) |
| | SS | Placed on 10-Day IL (The Cincinnati Reds placed INF Matt McLain on the 10-day injured list.) |
| | SS | Starting to Serve Suspension (Major League Baseball suspended Cincinnati Reds INF Noelvi Marte for 80 games.) |
| | P | Sent to Minors (The Cincinnati Reds sent RHP Brooks Kriske to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds sent LHP Tyler Gilbert to the minors.) |
| | C | Sent to Minors (The Cincinnati Reds sent C P.J. Higgins to the minors.) |
| | C | Sent to Minors (The Cincinnati Reds sent C Austin Wynns to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds sent LHP Justin Bruihl to the minors.) |
| | 1B | Released (The Cincinnati Reds released INF Mike Ford.) |
| | P | Sent to Minors (The Cincinnati Reds sent RHP Tony Santillan to the minors.) |
| | 1B | Sent to Minors (The Cincinnati Reds sent INF Mike Ford to the minors.) |
| | 2B | Traded (The Toronto Blue Jays traded INF Santiago Espinal to the Cincinnati Reds.) From |
Chris McElvain | | P | Traded (The Cincinnati Reds traded RHP Chris McElvain to the Toronto Blue Jays.) To |
| | 2B | Released (The Cincinnati Reds released INF Tony Kemp.) |
| | 3B | Declared Free Agency (INF Josh Harrison elected free agency.) |
| | P | Signed (The Cincinnati Reds signed LHP Justin Wilson.) |
| | P | Sent to Minors (The Cincinnati Reds optioned RHP Connor Phillips to the minors.) |
| | RF | Sent to Minors (The Cincinnati Reds sent OF Conner Capel to the minors.) |
| | LF | Sent to Minors (The Cincinnati Reds optioned OF Bubba Thompson to the minors.) |
| | SS | Sent to Minors (The Cincinnati Reds sent INF Erik González to the minors.) |
| | 2B | Sent to Minors (The Cincinnati Reds sent INF Mark Mathias to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds optioned RHP Christian Roa to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds optioned RHP Carson Spiers to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds optioned RHP Casey Legumina to the minors.) |
| | RF | Sent to Minors (The Cincinnati Reds optioned OF Rece Hinds to the minors.) |
| | CF | Sent to Minors (The Cincinnati Reds optioned OF Jacob Hurtubise to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds optioned RHP Lyon Richardson to the minors.) |
| | 2B | Sent to Minors (The Cincinnati Reds sent INF Tyler Callihan to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds sent RHP Rhett Lowder to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds sent RHP Zach Maxwell to the minors.) |
| | C | Sent to Minors (The Cincinnati Reds sent C Mat Nelson to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds sent RHP Chase Petty to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds sent LHP Reiver Sanmartin to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds sent LHP Jacob Heatherly to the minors.) |
| | C | Sent to Minors (The Cincinnati Reds sent C Michael Trautwein to the minors.) |
| | CF | Sent to Minors (The Cincinnati Reds sent OF Blake Dunn to the minors.) |
| | SS | Sent to Minors (The Cincinnati Reds sent INF Edwin Arroyo to the minors.) |
| | C | Sent to Minors (The Cincinnati Reds sent C Daniel Vellojin to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds sent RHP Julian Aguiar to the minors.) |
| | 2B | Non-roster Invitee (The Cincinnati Reds invited INF Tony Kemp to spring training.) |
| | 2B | Signed (The Cincinnati Reds signed INF Tony Kemp to a minor league contract.) |
| | P | Signed (The Cincinnati Reds signed RHP Vladimir Gutierrez to a minor league contract with an invitation to spring training.) |
| | P | Designated for Assignment (The Cincinnati Reds designated RHP Levi Stoudt for assignment.) |
| | LF | Claimed on Unconditional Release Waivers (The Cincinnati Reds claimed OF Bubba Thompson off waivers from the Minnesota Twins.) |
| | 3B | Non-roster Invitee (The Cincinnati Reds signed INF Josh Harrison to a minor league contract with an invitation to spring training.) |
| | C | Non-roster Invitee (The Cincinnati Reds invited C Mat Nelson to spring training.) |
| | C | Non-roster Invitee (The Cincinnati Reds invited C Daniel Vellojin to spring training.) |
| | P | Traded (The Cincinnati Reds traded RHP Daniel Duarte to the Texas Rangers.) To |
| | P | Designated for Assignment (The Cincinnati Reds designated RHP Daniel Duarte for assignment.) |
| | P | Signed (The Cincinnati Reds signed LHP Brent Suter.) |
| | P | Signed (The Cincinnati Reds signed RHP Alan Busenitz to a minor league contract.) |
| | C | Non-roster Invitee (The Cincinnati Reds invited C Austin Wynns to spring training.) |
| | P | Non-roster Invitee (The Cincinnati Reds signed LHP Justin Bruihl to a minor league contract with an invitation to spring training.) |
| | C | Designated for Assignment (The Cincinnati Reds designated C Austin Wynns for assignment.) |
| | P | Signed (The Cincinnati Reds signed RHP Frankie Montas.) |
| | P | Signed (The Cincinnati Reds signed RHP Buck Farmer.) |
| | LF | Designated for Assignment (The Cincinnati Reds designated OF Bubba Thompson for assignment.) |
| | P | Signed (The Cincinnati Reds signed RHP Brett Kennedy to a minor league contract.) |
| | 3B | Signed (The Cincinnati Reds signed INF Jeimer Candelario.) |
| | CF | Drafted Via Rule 5 (The Cincinnati Reds selected OF Alexander Ovalles in the Rule 5 Draft.) |
| | 2B | Drafted Via Rule 5 (The Cincinnati Reds selected INF Levi Jordan in the Rule 5 Draft.) |
| | P | Drafted Via Rule 5 (The Cincinnati Reds selected RHP Brock Bell in the Rule 5 Draft.) |
| | SS | Non-roster Invitee (The Cincinnati Reds signed INF Erik Gonzalez to a minor league contract with an invitation to spring training.) |
| | SS | Signed (The Cincinnati Reds signed INF Erik González to a minor league contract.) |
| | P | Signed (The Cincinnati Reds signed RHP Nick Martinez.) |
| | 2B | Signed (The Cincinnati Reds signed INF Mark Mathias signed to a minor league contract.) |
| | P | Signed (The Cincinnati Reds signed RHP Emilio Pagán.) |
| | P | Released (The Cincinnati Reds released RHP Derek Law.) |
| | P | Released (The Cincinnati Reds released LHP Reiver Sanmartin.) |
| | 3B | Released (The Cincinnati Reds released INF Nick Senzel.) |
| | RF | Recalled From Minors Rehab (The Cincinnati Reds selected the contract of OF Rece Hinds from the minors.) |
| | P | Recalled From Minors Rehab (The Cincinnati Reds selected the contract of RHP Christian Roa from the minors.) |
| | CF | Recalled From Minors Rehab (The Cincinnati Reds selected the contract of OF Jacob Hurtubise from the minors.) |
| | P | Declared Free Agency (RHP Manuel Cachutt declared free agency.) |
| | P | Declared Free Agency (RHP Zack Brown declared free agency.) |
| | P | Declared Free Agency (RHP Ryan Nutof declared free agency.) |
| | P | Declared Free Agency (RHP Ricky Karcher declared free agency.) |
| | C | Declared Free Agency (C Jhonny Pereda declared free agency.) |
| | SS | Declared Free Agency (INF Steven Leyton declared free agency.) |
| | P | Declared Free Agency (RHP Ben Lively declared free agency.) |
| | P | Declared Free Agency (RHP Ryan Meisinger declared free agency.) |
| | P | Declared Free Agency (RHP Mac Sceroler declared free agency.) |
| | P | Declared Free Agency (RHP Eduardo Salazar declared free agency.) |
| | C | Declared Free Agency (C Chuckie Robinson declared free agency.) |
| | P | Declared Free Agency (RHP Teddy Stankiewicz declared free agency.) |
| | P | Declared Free Agency (RHP Danis Correa declared free agency.) |
| | 1B | Declared Free Agency (INF Jason Vosler declared free agency.) |
| | P | Activated (The Cincinnati Reds activated RHP Graham Ashcraft.) |
| | P | Activated (The Cincinnati Reds activated LHP Reiver Sanmartin.) |
| | C | Declared Free Agency (C Curt Casali elected free agency.) |
| | P | Activated (The Cincinnati Reds activated LHP Nick Lodolo.) |
| | 1B | Declared Free Agency (INF Joey Votto elected free agency.) |
| | P | Activated (The Cincinnati Reds activated RHP Carson Spiers.) |
| | P | Activated (The Cincinnati Reds activated RHP Levi Stoudt.) |
| | P | Activated (The Cincinnati Reds activated RHP Casey Legumina.) |
| | SS | Activated (The Cincinnati Reds activated INF Jose Barrero.) |
| | SS | Activated (The Cincinnati Reds activated INF Matt McLain.) |
| | P | Activated (The Cincinnati Reds activated RHP Tejay Antone.) |
| | P | Activated (The Cincinnati Reds activated RHP Lyon Richardson.) |
| | LF | Activated (The Cincinnati Reds activated OF Bubba Thompson.) |
| | C | Activated (The Cincinnati Reds activated C Curt Casali.) |
| | CF | Activated (The Cincinnati Reds activated OF TJ Hopkins.) |
| | P | Activated (The Cincinnati Reds activated RHP Daniel Duarte.) |
| | CF | Declared Free Agency (Cincinnati Reds OF Harrison Bader declared free agency.) |
| | P | Declared Free Agency (Cincinnati Reds RHP Buck Farmer declared free agency.) |
| | P | Declared Free Agency (RHP Vladimir Gutierrez declared free agency.) |
| | LF | Claimed on Unconditional Release Waivers (The Cincinnati Reds claimed OF Bubba Thompson off waivers from the Kansas City Royals.) |
| | P | Sent to Minors (The Cincinnati Reds sent RHP Ben Lively outright to the minors.) |
| | P | Designated for Assignment (The Cincinnati Reds designated RHP Ben Lively for assignment.) |
| | P | Declared Free Agency (RHP Alan Busenitz declared free agency.) |
| | P | Declared Free Agency (RHP Justin Dunn declared free agency.) |
| | RF | Declared Free Agency (OF Henry Ramos has declared free agency.) |
| | P | Declared Free Agency (RHP Brett Kennedy declared free agency.) |
| | P | Declared Free Agency (RHP Silvino Bracho declared free agency.) |
| | P | Sent to Minors (The Cincinnati Reds sent RHP Justin Dunn outright to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds sent RHP Connor Overton outright to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds sent RHP Brett Kennedy outright to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds sent RHP Vladimir Gutierrez outright to the minors.) |
| | P | Sent to Minors (The Cincinnati Reds sent RHP Alan Busenitz outright to the minors.) |
| | 3B | Released (The Cincinnati Reds released INF Michel Triana.) |
| | 2B | Released (The Cincinnati Reds released INF Alejo Lopez.) |
| | P | Released (The Cincinnati Reds released RHP Michael Mariot.) |
| | SS | Released (The Cincinnati Reds released INF Matt Reynolds.) |
| | P | Released (The Cincinnati Reds released RHP Alec Mills.) |
| | SS | Released (The Cincinnati Reds released INF Ilvin Fernandez.) |
| | P | Released (The Cincinnati Reds released RHP Kevin Herget.) |
| | C | Released (The Cincinnati Reds released C Andy Yerzy.) |
| | P | Released (The Cincinnati Reds released RHP Matt Pidich.) |
| | RF | Released (The Cincinnati Reds released OF Ashton Creal.) |
| | P | Recalled From Minors Rehab (The Cincinnati Reds selected the contract of RHP Alan Busenitz.) |
| | P | Sent to Minors (The Cincinnati Reds optioned RHP Carson Spiers to the minors.) |
| | P | Recalled From Minors Rehab (The Cincinnati Reds recalled RHP Carson Spiers from the minors.) |
| | P | Placed on 15-Day IL (The Cincinnati Reds placed RHP Daniel Duarte on the 15-day injured list.) |
| | SS | Released (The Cincinnati Reds released INF Kevin Newman.) |